Smarties set to lose their tube: first they remove the cardboard insert from Bounty bars ('Mars of Slough, you've really done it now!'), then they replace the ecological combination of silver foil and paper from the packaging of Kit Kats in favour of plastic, now they're about to change the Smarties round tube to a hexagonal one with flip-top lid! At least they will be slightly greener, dispensing with the plastic lid.